FLYGT 3126.290, Инструкция по установке, эксплуатации и обслуживанию

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Cause Remedy
The impeller is stuck. Clean:
• The impeller
• The sump in order to prevent the impeller from clogging again.
Always state the serial number of your product, see Product Description (page 11).
The pump does not stop when a level sensor is used
DANGER: Crush Hazard
Moving parts can entangle or crush. Always disconnect and lock out power before
servicing to prevent unexpected startup. Failure to do so could result in death or serious
injury.
Cause Remedy
The pump is unable to empty the
sump to the stop level.
Check that:
• There are no leaks from the piping and/or discharge connection.
• The impeller is not clogged.
• The non-return valve(s) are functioning properly.
• The pump has adequate capacity. For information:
Contact the local sales and service representative.
There is a malfunction in the level-
sensing equipment.
• Clean the level regulators.
• Check the functioning of the level regulators.
• Check the contactor and the control circuit.
• Replace all defective items.
The stop level is set too low. Raise the stop level.
Always state the serial number of your product, see Product Description (page 11).
The pump starts-stops-starts in rapid sequence
Cause Remedy
The pump starts due to back-flow
which fills the sump to the start level
again.
Check that:
• The distance between the start and stop levels is sufficient.
• The non-return valve(s) work(s) properly.
• The length of the discharge pipe between the pump and the first non-
return valve is sufficiently short.
The self-holding function of the
contactor malfunctions.
Check:
• The contactor connections.
• The voltage in the control circuit in relation to the rated voltages on the
coil.
• The functioning of the stop-level regulator.
• Whether the voltage drop in the line at the starting surge causes the
contactor's self-holding malfunction.
Always state the serial number of your product, see Product Description (page 11).
The pump runs but the motor protection trips
DANGER: Crush Hazard
Moving parts can entangle or crush. Always disconnect and lock out power before
servicing to prevent unexpected startup. Failure to do so could result in death or serious
injury.
Troubleshooting
Flygt 3126.290 Installation, Operation, and Maintenance Manual 41